Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

This former coal gasification plant found a curious second life as a popular public park.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

World's largest Christmas store.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

A unusual sanctuary for abused and exotic animals in South Jersey.

Hidden deep within New Jersey Pine Barrens is a massive graffiti wonderland.

Home of the golf club used by Alan Shepard on the moon, and more artifacts from the sport's history.

Thomas Edison's home and final resting place also boasts an impressive garage, where some of the earliest electric cars are on display.

Take a step into the workshop where Edison and his employees revolutionized the world.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Paris' linguistic guide to the international language of, yes, love.

The video game-themed street art first popped up in the French city.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Drink wine handed out through a window as part of an age-old tradition.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.